return a - floorf( a );
}
+
+__attribute__ ((deprecated))
static float stable_force( float current, float diff )
{
float fnew = current + diff;
return fnew;
}
+static float vg_cfrictf( float current, float F )
+{
+ return -vg_signf(current) * vg_minf( F, fabsf(current) );
+}
+
static inline int vg_min( int a, int b )
{
return a < b? a: b;
m4x3_expand_aabb_point( m, box, (v3f){ b[0], a[1], b[2] } );
}
-int ray_aabb( boxf box, v3f co, v3f dir, float dist )
+int ray_aabb1( boxf box, v3f co, v3f dir_inv, float dist )
{
v3f v0, v1;
float tmin, tmax;
v3_sub( box[0], co, v0 );
v3_sub( box[1], co, v1 );
- v3_div( v0, dir, v0 );
- v3_div( v1, dir, v1 );
+ v3_mul( v0, dir_inv, v0 );
+ v3_mul( v1, dir_inv, v1 );
tmin = vg_minf( v0[0], v1[0] );
tmax = vg_maxf( v0[0], v1[0] );
tmin = vg_maxf( tmin, vg_minf( v0[2], v1[2] ));
tmax = vg_minf( tmax, vg_maxf( v0[2], v1[2] ));
- return tmax >= tmin && tmin < dist && tmax > 0;
+ return (tmax >= tmin) && (tmin <= dist) && (tmax >= 0.0f);
}
static inline void m4x3_lookat( m4x3f m, v3f pos, v3f target, v3f up )
p[2] = p[2] / l;
}
-static inline int plane_intersect( double a[4], double b[4],
- double c[4], double p[4] )
+static int plane_intersect3( v4f a, v4f b, v4f c, v3f p )
{
- double const epsilon = 1e-8f;
-
- double x[3];
- double d;
-
- x[0] = a[1] * b[2] - a[2] * b[1];
- x[1] = a[2] * b[0] - a[0] * b[2];
- x[2] = a[0] * b[1] - a[1] * b[0];
-
- d = x[0] * c[0] + x[1] * c[1] + x[2] * c[2];
+ float const epsilon = 1e-6f;
- if( d < epsilon && d > -epsilon ) return 0;
+ v3f x;
+ v3_cross( a, b, x );
+ float d = v3_dot( x, c );
- p[0] = (b[1] * c[2] - b[2] * c[1]) * -a[3];
- p[1] = (b[2] * c[0] - b[0] * c[2]) * -a[3];
- p[2] = (b[0] * c[1] - b[1] * c[0]) * -a[3];
-
- p[0] += (c[1] * a[2] - c[2] * a[1]) * -b[3];
- p[1] += (c[2] * a[0] - c[0] * a[2]) * -b[3];
- p[2] += (c[0] * a[1] - c[1] * a[0]) * -b[3];
-
- p[0] += (a[1] * b[2] - a[2] * b[1]) * -c[3];
- p[1] += (a[2] * b[0] - a[0] * b[2]) * -c[3];
- p[2] += (a[0] * b[1] - a[1] * b[0]) * -c[3];
-
- p[0] = -p[0] / d;
- p[1] = -p[1] / d;
- p[2] = -p[2] / d;
+ if( (d < epsilon) && (d > -epsilon) ) return 0;
+
+ v3f v0, v1, v2;
+ v3_cross( b, c, v0 );
+ v3_cross( c, a, v1 );
+ v3_cross( a, b, v2 );
+
+ v3_muls( v0, a[3], p );
+ v3_muladds( p, v1, b[3], p );
+ v3_muladds( p, v2, c[3], p );
+ v3_divs( p, d, p );
return 1;
}
+int plane_intersect2( v4f a, v4f b, v3f p, v3f n )
+{
+ float const epsilon = 1e-6f;
+
+ v4f c;
+ v3_cross( a, b, c );
+ float d = v3_length2( c );
+
+ if( (d < epsilon) && (d > -epsilon) )
+ return 0;
+
+ v3f v0, v1, vx;
+ v3_cross( c, b, v0 );
+ v3_cross( a, c, v1 );
+
+ v3_muls( v0, a[3], vx );
+ v3_muladds( vx, v1, b[3], vx );
+ v3_divs( vx, d, p );
+ v3_copy( c, n );
+
+ return 1;
+}
+
+static int plane_segment( v4f plane, v3f a, v3f b, v3f co )
+{
+ float d0 = v3_dot( a, plane ) - plane[3],
+ d1 = v3_dot( b, plane ) - plane[3];
+
+ if( d0*d1 < 0.0f )
+ {
+ float tot = 1.0f/( fabsf(d0)+fabsf(d1) );
+
+ v3_muls( a, fabsf(d1) * tot, co );
+ v3_muladds( co, b, fabsf(d0) * tot, co );
+ return 1;
+ }
+
+ return 0;
+}
+
static inline double plane_polarity( double p[4], double a[3] )
{
return
q_normalize( d );
}
+static void euler_m3x3( v3f angles, m3x3f d )
+{
+ float cosY = cosf( angles[0] ),
+ sinY = sinf( angles[0] ),
+ cosP = cosf( angles[1] ),
+ sinP = sinf( angles[1] ),
+ cosR = cosf( angles[2] ),
+ sinR = sinf( angles[2] );
+
+ d[2][0] = -sinY * cosP;
+ d[2][1] = sinP;
+ d[2][2] = cosY * cosP;
+
+ d[0][0] = cosY * cosR;
+ d[0][1] = sinR;
+ d[0][2] = sinY * cosR;
+
+ v3_cross( d[0], d[2], d[1] );
+}
+
static inline void q_m3x3( v4f q, m3x3f d )
{
float
}
}
+static void q_mulv( v4f q, v3f v, v3f d )
+{
+ v3f v1, v2;
+
+ v3_muls( q, 2.0f*v3_dot(q,v), v1 );
+ v3_muls( v, q[3]*q[3] - v3_dot(q,q), v2 );
+ v3_add( v1, v2, v1 );
+ v3_cross( q, v, v2 );
+ v3_muls( v2, 2.0f*q[3], v2 );
+ v3_add( v1, v2, d );
+}
+
enum contact_type
{
k_contact_type_default,
return v3_length2( v0 );
}
+VG_STATIC int point_inside_aabb( boxf box, v3f point )
+{
+ if((point[0]<=box[1][0]) && (point[1]<=box[1][1]) && (point[2]<=box[1][2]) &&
+ (point[0]>=box[0][0]) && (point[1]>=box[0][1]) && (point[2]>=box[0][2]) )
+ return 1;
+ else
+ return 0;
+}
+
VG_STATIC void closest_point_aabb( v3f p, boxf box, v3f dest )
{
v3_maxv( p, box[0], dest );
/* Parralel */
a = v3_dot( v0, h );
+
if( a > -kEpsilon && a < kEpsilon )
return 0;